On Fri, 2013-03-01 at 09:06 -0800, Sundaravalli Narayanaswami wrote: > Hi all, > > I am working on a MILP model for a transportation problem, with 24 > data sets. Some of the data sets are solved to integer optimality and > others return an integer undefined by GLPK solver. > > To verify and evaluate my solutions, I wanted to solve them using > other commercial solvers. I used Gusec to translate my mod files (no > external dat file) into lp and mps files. I ran each of my lp files on > CPLEX and each of my mps files on Gurobi. Gurobi and CPLEX solutions > are exactly same for each problem instance and GLPK solutions are > significantly different (Small valued for a minimization problem) > > Why are GLPK results hugely different, when all other solvers generate > numerically the same solutions? I set similar parameters in all > solvers.
Do the solutions differ in the optimal objective values or only in the values of the variables ? > > TIA, > SV > _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
